#include<cstdio>
#define InFile "chatnoir.in"
#define OutFile "chatnoir.out"
using namespace std;
int T;
short N,M,X,Y;
int main(){
      freopen(InFile,"r",stdin);
      freopen(OutFile,"w",stdout);
      scanf("%d",&T);
      int r;
      for(r=1;r<=T;r++){
        scanf("%hd%hd%hd%hd",&N,&M,&X,&Y);
        if(X<=5 || Y<=5 || X+4>=N || Y+4>=N)
            printf("DA\n");
        else
            printf("NU\n");
      }
      fclose(stdin);
      fclose(stdout);
      return 0;
}